TWM562173U - Riveting distance sensing assembly of electric rivet gun - Google Patents

Abstract

A rivet distance sensing assembly for an electric rivet gun, which is mounted in a barrel portion of an outer casing of the electric rivet gun and includes a fixing seat, a moving seat and is spaced apart from the fixing seat The upper two magnetic elements and a Hall Effect Sensor mounted on the moving base, the moving base is coupled with a transmission assembly of the electric rivet gun and movable relative to the fixed seat. During the moving of the Hall effect sensor to move between the two magnetic elements, the Hall effect sensor senses a change in the magnetic field and outputs a varying voltage to a control unit to control the change according to the voltage. The operation of the transmission assembly thereby accurately positioning the moving seat and thereby accurately controlling the range of movement of one of the jaw assemblies carried by the transmission assembly.

Description

Pull pin distance sensing component of electric rivet gun

The utility model relates to a rivet gun, in particular to a rivet distance sensing component of an electric rivet gun.

The rivet is a fastener that can fix two or more sheets together, and mainly includes a nail core and a nail cap, and the nail cap is sleeved at one end of the nail core. The rivet gun is used to clamp and pull the nail until it is broken to force the nut to deform, thereby fixing the plate between a rim and a deformation of the nut.

In the prior art electric rivet gun, a motor is used to drive a gripper assembly for gripping a nail center, the motor has a rotating shaft, and the rotating shaft converts the rotary motion into a linear motion through a gear set. Therefore, the jaw assembly and the nail core are pulled, so that the distance between the jaw assembly and the nail core can be controlled by setting the number of rotations of the rotation shaft of the motor; and the jaw assembly can be set by using a photointerrupter. If the distance between the nail and the nail is pulled, one of the photointerrupters is disposed at a starting position where the jaw assembly is not pulled, and the other photointerrupter is disposed at an end position of the nail that can be pulled off. A breaker controls the operation of the motor to limit the range of movement of the jaw assembly.

However, the above-mentioned manner of controlling the distance of pulling the jaw assembly by setting the number of rotations of the rotating shaft of the motor causes a difference in the rotational speed of the rotational speed of the rotating shaft due to the difference in the input voltage. The difference will directly affect the time difference between the rotation and the reverse rotation of the rotating shaft. In addition, after the gear set and the motor are used for a long time, the teeth will wear or accumulate between the teeth, resulting in the use of the motor. The accuracy of positioning is reduced by the number of rotations of the rotating shaft.

In addition, the above-mentioned manner of using the photointerrupter to control the moving range of the jaw assembly causes the light to be blocked due to the fixing manner of the photointerrupter and the accumulation of impurities generated during the use of the electric nail gun. The position of the breaker is offset from the direct angle of the light, which in turn affects the accuracy of the set starting position and the end position; furthermore, the light has a certain illumination range after projection, and the illumination range also causes the set movement The deviation of the range.

As described above, in the prior art, whether the number of rotations of the rotating shaft of the motor is set or the position of the jaw assembly is controlled by the photointerrupter is often caused by external influence or length of use. The problem of reduced accuracy is such that the distance between the jaw assembly and the nail core cannot be precisely controlled.

In view of the problems of the prior art described above, the present invention aims to provide a rivet distance sensing assembly for an electric rivet gun that accurately controls the range of movement of the jaw assembly of the electric rivet gun.

In order to achieve the above-mentioned creative purpose, the technical method adopted by the present invention is to install a rivet distance sensing component of an electric rivet gun in a barrel portion of an outer casing of the electric rivet gun, the zipper distance sense The measuring assembly comprises: a fixing seat fixed in the barrel portion of the outer casing; a moving seat disposed in the barrel portion of the outer casing and being at a front end and a rear of the barrel portion The ends are moved back and forth relative to the fixing base; two magnetic elements are disposed on the fixing base, and the two magnetic elements are arranged along the moving direction of the moving seat; a Hall effect sensor is fixed Moving on the moving seat along with the moving seat causes the Hall effect sensor to move back and forth between the two magnetic elements.

The fixing base can have a base portion, two extending arms and a mounting plate. The base portion is fixed to the outer casing body. The extending arm is formed on one end surface of the base portion, and each extending arm is provided with a long guiding hole. The long axis extending direction of the long guiding hole is parallel to the connecting direction of the front end and the rear end of the barrel portion, and the mounting plate is disposed on one of the extending arms; the moving seat may have two guiding rods, and the two guiding rods respectively The protrusions are disposed on opposite sides of the movable seat and respectively penetrate through the long guide holes of the two extension arms of the fixed seat.

The mounting plate of the fixing seat and the extending arm provided with the mounting plate may be separable components, and the mounting plate is screwed to the extending arm.

The mounting plate of the aforementioned fixing seat may also be integrally formed on the extension arm provided with the mounting plate.

The two magnetic elements can be embedded and fixed in the mounting plate in a position-independent manner.

One of the magnetic elements may be embedded in the mounting plate in a non-adjustable position, and the other magnetic element may be adjustably embedded in the mounting plate. The adjustable magnetic element may be adjacent or Move away from the direction of the unadjustable magnetic element at this position.

The magnetic plate on the mounting plate for adjusting the position may be provided with a consistent hole, the width of the through hole being greater than the width of the adjustable magnetic component, and the mounting plate is provided with two positioning screws. The positioning screws protrude into the through holes in mutually perpendicular directions and abut against and urge the magnetic members therein.

The aforementioned Hall effect sensor can be soldered to a circuit board, and the circuit board can be fixed on the moving base by means of adhesive bonding or by embedded clamping.

An advantage of the present invention is that the Hall effect sensor provided on the moving seat is moved between the magnetic element at the front end of the barrel near the barrel portion and the magnetic element at the position near the rear end of the barrel portion. The Hall effect sensor senses a change in the magnetic field and outputs the changed voltage to a control unit, so that the control unit controls the operation of a motor of one of the transmission components of the electric rivet gun according to the change of the voltage, thereby accurately Positioning the moving seat and thereby accurately controlling the range of movement of one of the jaw assemblies carried by the transmission assembly.

The technical means adopted by the present invention for achieving a predetermined new purpose are further explained below in conjunction with the drawings and the preferred embodiment of the present invention.

Referring to FIG. 1 and FIG. 2A, the rivet distance sensing assembly 10 of the present invention is mounted in an outer casing 20 of an electric rivet gun. The outer casing 20 has a grip portion 21 and a barrel portion. 22. The barrel portion 22 is formed at an upper end of the grip portion 21. The barrel portion 22 has a front end 221 and a rear end 222 at opposite ends. The front end 221 of the barrel portion 22 is provided with a clip. The jaw assembly of the nail that pulls the nail.

Referring to FIG. 2B, FIG. 3 and FIG. 4, the rivet distance sensing assembly 10 of the present invention is mounted in the barrel portion 22 of the outer casing 20 and includes a fixing base 11, a moving base 12, and two magnetic bodies. Elements 13A, 13B and a Hall Effect Sensor 14.

The fixing base 11 is non-movably fixed in the barrel portion 22 of the outer casing 20. The fixing base 11 has a base portion 111, two extending arms 112 and a mounting plate 113. The base portion 111 is opposite to the outer casing 20 The extending arm 112 is formed on one end surface of the base portion 111. Each of the extending arms 112 is provided with a long guiding hole 114. The long axis extending direction of the long guiding hole 114 is parallel to the barrel portion 22. The mounting plate 113 is disposed on one of the extending arms 112 in the direction in which the front end 221 is connected to the rear end 222.

As shown in FIG. 4, in the preferred embodiment of the present invention, the mounting plate 113 of the fixing base 11 and the extending arm 112 provided with the mounting plate 113 are separable members, and the mounting plate 113 is provided with a screw 115. The locking arm is fixed to the extension arm 112.

Referring further to FIG. 7, in another preferred embodiment of the present invention, the mounting plate 113' of the mounting seat 11' is integrally formed on the extension arm 112' provided with the mounting plate 113'.

The moving base 12 is disposed in the barrel portion 22 of the outer casing 20 and is movable back and forth relative to the fixed seat 11 between the front end 221 and the rear end 222 of the barrel portion 12, the moving base 12 having two guiding rods 121. The two guiding rods 121 are respectively disposed on opposite sides of the moving base 12 and are respectively disposed in the long guiding holes 112 of the two extending arms 111 of the fixing base 11 so that each guiding rod 121 can be along the phase The corresponding long guide hole 112 moves, thereby restricting the moving range and the moving distance of the moving seat 12, and also improving the stability of the moving seat 12 when moving.

The two magnetic elements 13A, 13B are disposed on the mounting plates 113, 113' of the fixing base 11, and the two magnetic elements 13A, 13B are arranged at intervals along the moving direction of the moving base 12 to make one of the magnetic elements 13A The position corresponds to the front end 221 of the barrel portion 22, the position of the other magnetic element 13B corresponds to the rear end 222 of the barrel portion 22, and the distance between the two magnetic members 13A, 13B is determined by the nail of the pull rod to be pulled. The length of the heart is determined.

As shown in FIG. 3 and FIG. 4, in the preferred embodiment of the present invention, the two magnetic elements 13A, 13B are non-adjustably embedded in the mounting plate 113 so that the two magnetic elements 13A, 13B are The distance between the two is fixed.

Referring to FIG. 8 and FIG. 9, in another preferred embodiment of the present invention, one of the magnetic elements 13A is non-adjustably embedded in the mounting plate 113", and the other magnetic element 13B is attached. Positionably adjustably embedded in the mounting plate 113", the positionally adjustable magnetic element 13B is movable toward or away from the position of the unadjustable magnetic element 13A to fine tune the relationship between the two magnetic elements 13A, 13B the distance.

As shown in FIG. 8 and FIG. 9, specifically, the mounting plate 113" is provided with a constant hole 116" at the position of the adjustable magnetic element 13B, and the width of the through hole 116" is larger than the position. The width of the magnetic element 13B, the width is a length parallel to the direction of the line connecting the front end 221 and the rear end 222 of the barrel portion 22, so that the magnetic element 13B can move left and right in the through hole 116", The mounting plate 113" is provided with two positioning screws 117", and the two positioning screws 117" protrude into the through hole 116" in a mutually perpendicular direction and abut against and urge the magnetic member 13B therein to make the magnetic The element 13B is forced to be positioned between the hole wall of the through hole 116" and the set screw 117".

The Hall effect sensor 14 is fixed on the moving seat 12 and can move back and forth between the front end 221 and the rear end 222 of the barrel portion 22 along with the moving seat 12, so that the Hall effect sensor 14 is in the second The magnetic elements 13A, 13B move back and forth, causing the Hall effect sensor 14 to induce a change in the magnetic field and convert the changed magnetic field into a varying voltage for output to a control unit. Specifically, the Hall effect sensor 14 is first soldered to a circuit board 15, and then the circuit board 15 is fixed to the moving base by means of adhesive bonding or in an embedded manner. 12 on.

Referring to FIG. 2 and FIG. 5, specifically, the moving base 12 is moved back and forth between the front end 221 and the rear end 222 of the barrel portion 12 by the driving assembly 30 of the electric rivet gun. The transmission assembly 30 is mounted in the outer casing 20 and includes a motor 31, a transmission rod 32 and a ball screw 33.

The motor 31 is mounted in the grip portion 21 of the outer casing 20 and has a rotating shaft 311 on which a driving gear 312 is sleeved.

The transmission rod 32 is disposed at the junction of the grip portion 21 of the outer casing 20 and the barrel portion 22. The two ends of the transmission rod 32 are respectively provided with an input gear 321 and an output gear 322, and the input gear 321 and the The drive gear 312 of the motor 31 is meshed, wherein the number of teeth of the input gear 321 is greater than the number of teeth of the output gear 322 and the number of teeth of the drive gear 312.

The ball screw 33 is disposed in the barrel portion 21 of the outer casing 20. The ball screw 33 includes a nut 331 and a screw shaft 332. The nut 331 is rotatably disposed in the barrel portion 21. The outer surface of the nut 331 is sleeved with a transmission gear 333. The transmission gear 333 is meshed with the output gear 322 of the transmission rod 32. The screw shaft 332 extends through the nut 331. The screw shaft 332 and the nut 331 A steel ball is disposed between the one end of the screw shaft 332 and the other end for providing the movable seat 12. With this configuration, when the motor 31 drives the rotating shaft 311 to drive the driving gear 312 to rotate, the nut 331 is rotated by the driving rod 32, and the screw shaft 332 is further driven together with the aforementioned jaw assembly and the movable seat 12 . Move back and forth in a straight line.

Referring to FIG. 5, when the electric rivet gun is not actuated, the movable seat 12 and the screw shaft 332 of the ball screw 33 are in the starting position, and the position of the Hall effect sensor 14 is corresponding to the position. The magnetic element 13A of the front end 221 of the barrel portion 22.

Referring further to FIG. 6, after the user presses a trigger switch of the electric rivet gun to activate the electric rivet gun, the control unit activates the motor 31 and controls the rotation speed of the motor 31, so that the motor 31 is driven by the motor 31. The gear 312 and the input gear 321 drive the transmission rod 32 to rotate. The transmission rod 32 further rotates the nut 331 of the ball screw 33 via the output gear 322 and the transmission gear 333 to rotate the screw shaft 332 of the ball screw 33. The movable seat 12 is moved toward the rear end 222 of the barrel portion 22 until the nail of the pull stud is pulled. After that, the user releases the trigger switch, so that the control unit causes the motor 31 to drive the transmission rod 32 to rotate in the reverse direction, so as to drive the movable seat 12 to return to the starting position via the ball screw 33, and exit the aforementioned pull-off. Nail heart. The magnetic field of the magnetic element 13A, 13B is sensed by the Hall effect sensor 14 to determine the stroke distance of the screw shaft 332 of the ball screw 33 and the position of the ball screw 33 and the moving base 12, thereby completing the nailing procedure. .

Wherein, the Hall effect sensor 14 disposed on the moving base 12 is in the position of the magnetic element 13A near the front end 221 of the barrel portion 22 and the magnetic element 13B at the end 222 of the barrel portion 22 near the barrel portion 22 During the movement between the Hall effect sensor 14, the change of the magnetic field is sensed and a varying voltage is output to the control unit, so that the control unit controls the operation of the motor 21 according to the change of the voltage, thereby accurately positioning the The position of the seat 12 is moved, and the screw shaft 332 of the ball screw 33 and the moving range of the jaw assembly are accurately controlled, that is, the purpose of accurately controlling the stroke of the electric rivet gun is achieved. Furthermore, by fine-tuning the distance between the two magnetic elements 13A, 13B, the pull stroke of the electric rivet gun can be further fine-tuned.

In the present invention, the magnetic elements 13A, 13B with high magnetic permeability are fixed at the required two point positions by structural positioning, and the magnetic poles (N pole / S pole) of the magnetic elements 13A, 13B are in accordance with the Hall effect sensor. The demand of 14 is adjusted to direct a particular polarity toward the Hall effect sensor 14, and then the motor 31 can be controlled by the control unit based on the information measured by the Hall effect sensor 14 to achieve clarity during the movement and The Hall effect sensor 14, the moving base 12, the screw shaft 332 of the ball screw 33, and the purpose of the jaw assembly are precisely positioned.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Although the present invention has been disclosed above in the preferred embodiments, it is not intended to limit the present invention, and any skilled person skilled in the art. Any simple modifications, equivalent changes and modifications made to the above embodiments in accordance with the technical spirit of the present invention are still within the scope of the present technical solutions without departing from the scope of the present invention.

10‧‧‧Pull distance sensing assembly
11, 11'‧‧‧ fixed seat
111‧‧‧ base
112, 112'‧‧‧ Extension arm
113, 113', 113" ‧‧‧ mounting plate
114‧‧‧Long guide hole
115‧‧‧ screws
116"‧‧‧Tongkong
117"‧‧‧ positioning screws
12‧‧‧Mobile seat
121‧‧‧guides
13A, 13B‧‧‧ magnetic components
14‧‧‧Hall effect sensor
15‧‧‧Circuit board
20‧‧‧Outer casing
21‧‧‧ grip part
22‧‧‧The Department of Guns
221‧‧‧ front end
222‧‧‧ Backend
30‧‧‧Transmission components
31 motor
311‧‧‧Rotary axis
312‧‧‧ drive gear
32‧‧‧Transmission rod
321‧‧‧ input gear
322‧‧‧Output gear
33‧‧‧Rolling screw
331‧‧‧ nuts
332‧‧‧Spiral shaft
333‧‧‧Transmission gear

1 is a perspective view of an electric rivet gun equipped with the stylus distance sensing assembly of the present invention. 2A is a perspective view of the electric rivet gun with the rivet distance sensing assembly of the present invention removed from the outer casing. 2B is a partial enlarged perspective view of the electric rivet gun of FIG. 2A. 3 is a perspective view showing a part of an element of an electric rivet gun equipped with the stylus distance sensing assembly of the present invention. 4 is an exploded perspective view of a portion of an electric rivet gun equipped with the stylus distance sensing assembly of the present invention. FIG. 5 is a side view of the rivet distance sensing assembly of the present invention in a state of use, wherein the Hall effect sensor corresponds to a magnetic element. Figure 6 is a side elevational view of the rivet distance sensing assembly of the present invention in use, wherein the position of the Hall effect sensor corresponds to another magnetic element. Fig. 7 is a perspective, cross-sectional view showing another preferred embodiment of the fixing base of the rivet distance sensing assembly of the present invention. Figure 8 is a perspective view of another preferred embodiment of the mounting plate and magnetic member of the stylus distance sensing assembly of the present invention. Figure 9 is a front elevation, partial cross-sectional view of another preferred embodiment of the mounting plate and magnetic member of the stylus distance sensing assembly of the present invention.

Claims (9)

A rivet distance sensing assembly for an electric rivet gun, which is mounted in a barrel portion of an outer casing of the electric rivet gun and includes a fixing seat, a moving seat, two magnetic elements and a Hall effect a Hall Effect Sensor, wherein: the fixing seat is fixed in the barrel portion of the outer casing; the moving seat is disposed in the barrel portion of the outer casing, and is at a front end and a rear end of the barrel portion Moving relative to the fixed seat; the two magnetic elements are disposed on the fixing seat, and the two magnetic elements are arranged at intervals along the moving direction of the moving seat; the Hall effect sensor is fixed on the moving seat Moving along with the moving seat, the Hall effect sensor moves back and forth between the two magnetic elements. The rivet distance sensing assembly of the electric rivet gun according to claim 1, wherein: the fixing base has a base portion, two extending arms and a mounting plate, and the base portion is fixed to the outer casing body, and the extending arm protrusion Extendingly formed on one end surface of the base, each extending arm is provided with a long guiding hole, and the long axis extending direction of the long guiding hole is parallel to the connecting direction of the front end and the rear end of the barrel portion, and the mounting plate is disposed at The movable base has two guiding rods, and the two guiding rods respectively protrude from opposite sides of the moving base and respectively pass through the long guiding holes of the two extending arms of the fixing seat. The rivet distance sensing assembly of the electric rivet gun of claim 2, wherein the mounting plate of the fixing seat and the extending arm provided with the mounting plate are separable components, and the mounting plate is screwed Fastened to the extension arm. The rivet distance sensing assembly of the electric rivet gun of claim 2, wherein the mounting plate of the fixing base is integrally formed on the extension arm provided with the mounting plate. The rivet distance sensing assembly of the electric rivet gun according to any one of claims 1 to 4, wherein the two magnetic element portions are non-adjustably embedded and fixed in the mounting plate. The rivet distance sensing assembly of the electric rivet gun of any one of claims 1 to 4, wherein one of the aforementioned magnetic element positions is non-adjustably embedded and fixed in the mounting plate, and the other magnetic element The position is adjustably embedded in the mounting plate, and the positionally adjustable magnetic member is movable toward or away from the position of the non-adjustable magnetic member. The rivet distance sensing assembly of the electric rivet gun of claim 6, wherein the magnetic component on the mounting plate for setting the position is provided with a consistent hole, and the width of the through hole is larger than the position. Adjusting the width of the magnetic component, the mounting plate is provided with two positioning screws, and the two positioning screws protrude into the through hole in mutually perpendicular directions and abut against and push against the magnetic component therein. The rivet distance sensing assembly of the electric rivet gun according to any one of claims 1 to 4, wherein the aforementioned Hall effect sensor is soldered to a circuit board, and the circuit board is dispensed The fixing method is fixed on the moving seat. The rivet distance sensing assembly of the electric rivet gun according to any one of claims 1 to 4, wherein the Hall effect sensor is soldered to a circuit board, and the circuit board is embedded The fastening method is fixed on the moving seat.